.iframe {
  width: 100vw;
  height: calc(100vh - 46px);
  position: absolute;
  top: 46px;
  font-size: 0;

  a {
    position: absolute;
    right: 80px;
    top: 10px;
    color: red;
    font-size: 15px;
    font-weight: bold;
  }

  iframe {
    width: 100%;
    height: 100%;
  }
}